Event EZbus digital mixer not booting , LCD message says: "becoming EZbus..."

Dead as all functions controlled digitally, except for the display showing
initial message.
This is someone else's broken one, posted out there and no response
"The power turns on and the green LED's next to the System and Audio buttons
flash for a second and then the LCD displays "becoming EZbus... It does not
advance from there. "

This one has that message but no LED response. x5 visual inspection over
the main board shows nothing amiss. DC rail voltages agree with the
regulator types, reseated cable connectors. Not explored ESR of caps etc
yet, any ideas to look for on Monday?

<Meat Plow> wrote in message news:(E-Mail Removed)...
> On Sat, 17 Apr 2010 13:56:25 +0100, "N_Cook" <(E-Mail Removed)>wrote:
>
> >Dead as all functions controlled digitally, except for the display
showing
> >initial message.
> >This is someone else's broken one, posted out there and no response
> >"The power turns on and the green LED's next to the System and Audio
buttons
> >flash for a second and then the LCD displays "becoming EZbus... It does
not
> >advance from there. "
> >
> >This one has that message but no LED response. x5 visual inspection over
> >the main board shows nothing amiss. DC rail voltages agree with the
> >regulator types, reseated cable connectors. Not explored ESR of caps etc
> >yet, any ideas to look for on Monday?
> >
>
> Lots of goodies inside like USB interface, Word Clock, SPDIF, MMC, all
> needing a fair amount of CPU control. My guess is the CPU is not
> completing its POST for some unknown reason. Maybe there is a way to
> physically reset the CPU like on a laptop where you're given a pinhole
> to do this. Or a battery that can be removed to clear the CMOS.

No battery or F-cap found unless on the analogue board.
Start up is the same as that other one , I'd not noticed the 2 LEDs flashing
on for 1 second.

Changed 3 , 0.47uF caps of ESR 25 to 30R but system still hangs. Beyond
checking oscillation around each of the 3 crystals its then a matter of
seeing if there are data sheets for the main chips

I've downloaded the datasheets for the
controller, Cypress AN2131QC, and
24 Bit Audio DIgital Signal Processor, Motorola XCB56362PV100
if anyone happens to be familiar with them, but I won't be fiddling
until Monday

<Meat Plow> wrote in message news:(E-Mail Removed)...
> On Sat, 17 Apr 2010 17:29:18 +0100, "N_Cook" <(E-Mail Removed)>wrote:
>
> >I've downloaded the datasheets for the
> >controller, Cypress AN2131QC, and
> >24 Bit Audio DIgital Signal Processor, Motorola XCB56362PV100
> >if anyone happens to be familiar with them, but I won't be fiddling
> >until Monday
> >
> >
> >
>
> Neither are the main logic control for the EZBus.


so another download for the CPLD XC95144XL, nowhere near any crystal
leaving converter CS8420 and flash mem AT29C256 of the big chips

Chris Tansit <(E-Mail Removed)> wrote in message
news:4bcae771$0$1491$(E-Mail Removed)...
> N_Cook said....
> >Dead as all functions controlled digitally, except for the
> >display showing initial message.
>
> Find out how to do a factory reset. That and clearing the memory
> or config and reflashing software (if possible) is the first thing
> you want to do.
>
> Software accounts for approx 90% of failures on this type of gear.
>


EZbus FAQ's file is no longer on their site, but still on
http://web.archive.org/web/200706091...oducts/Digital
/EZbus_FAQs.htm#8
no mention of reset

I did try powering up pressing
System + Audio (the LED flash up pair) while powering up , but no change
But I will try Play+Record mentioned as another make of digital mixer reset
before delving more into the hardware.
Any other button combination suggestions, nothing for EZbus found out there.

As nearly fully separated 3 lines of 28 control buttons I will try the small
subset of 378 combinations of adjascent pairs and the subset of adjascent
triplets of 3276, 3 button press combinations at power up, unfortunately
having to leave 10 seconds in between as longish 5s or so power-down/clear.

Then monitor the 3 clock lines to the CPLD and then try forcing the GSR
(Global Set Reset) pin

This other person's experience

"When connected to a PC computer via USB, the computer recognizes that a USB
device is found but cannot install it because it does not recognize what it
is. I went to the Event support site and downloaded the EZbusInstaller,
Firmware, ASIO update and XP update. Followed instructions to install the
Installer and that seemed to work, but when I try to run the Firmware it
does not recognize the unit and gets and error message that says no EZbus
connected. The Firmware instructions say that in order to run the file, the
unit has to be set so that the display is at the USB setting, by pressing
the System button and then the Next button several times. But it won't pass
the message that shows "becoming EZbus..." "

suggests that and this is a "pre-POST" problem but there is some variation
in LEDs lit on some button press combinations at power up , sometimes the
MIX LED lights on one pair of button presses , rather than the System+Audio
LEDs, as normal. Does this suggest a post-POST problem?

unlike from the EZbus FAQ having presumably gone past that and then hanging
at a blank screen but is initialising the USB function there.
" symptom:
I tried to update my EZbus firmware and, and now my EZbus LCD blank.
so;ution:
If for some reason the firmware updating process in interrupted (e.g., the
USB cable is accidentally removed, or you have a power failure), the EZbus
will not have the complete set of operating system instructions it needs to
function properly. The most obvious symptom of this condition is the blank
LCD.

1) If you are using the latest EZbus driver, you simply need to
double-click on the firmware updater to reload the firmware into the EZbus.
Note that you may have to do this several times, power-cycling the EZbus
in-between each attempt, before the firmware will be successfully loaded.
This is normal, and is not an indication of any additional problem.

2) If you are not using the latest EZbus driver, download the zipped
file (below) for your operating system (Win XP or ME) to your computer's
desktop, or a folder of your choosing

WinXP Firmware zip:
WinME Firmware zip:

3) Unzip the file, again to either your desktop or a folder of your
choosing.

4) Navigate to your computer's Device Manager and highlight USB Device.
Now go to Properties and click on Update Driver. Point the Update Wizard to
the desktop or to the folder into which you downloaded and unzipped the
files. At this point, Windows will reinstall the file EZbus.inf, which will
allow you to refresh the firmware, as in Step 1, above.

5) Once the EZbus.inf file has been installed, the listing within Device
Manager will now read EZbus-Needs Firmware Refresh, rather than USB Device.
At this point, follow the procedures outline in Step 1, above, until the
EZbus operating system is restored. "

Would it be worth trying to download firmware code and trying a USB link up?
going by the other person's experience, no point

2 and 3 button power-ups produced nothing. About 10MHz on the 3 CPLD clocks
and GSR goes high briefly about 3 seconds in then stays low. Whereto next ?
not graveyard / mule paddock surely

<Meat Plow> wrote in message news:(E-Mail Removed)...
> On Mon, 19 Apr 2010 10:16:29 +0100, "N_Cook" <(E-Mail Removed)>wrote:
>
> >2 and 3 button power-ups produced nothing. About 10MHz on the 3 CPLD
clocks
> >and GSR goes high briefly about 3 seconds in then stays low. Whereto next
?
> >not graveyard / mule paddock surely
> >
>
> Email Event and ask them if they know of anyone who might have more
> information?

Well I've sent the following but I somehow doubt anything useful in reply


Event Ezbus, fails to boot
Just the message "Becoming Ezbus..." and nothing else, no response to
anything. I'm an electronic engineer so if an internal physical reset is all
that is required, no problem. I Have tried all easy 2 and 3 button push
"factory reset" at power-up combinations.

N_Cook <(E-Mail Removed)> wrote in message
news:hqhmlg$gas$(E-Mail Removed)...
> <Meat Plow> wrote in message news:(E-Mail Removed)...
> > On Mon, 19 Apr 2010 10:16:29 +0100, "N_Cook" <(E-Mail Removed)>wrote:
> >
> > >2 and 3 button power-ups produced nothing. About 10MHz on the 3 CPLD
> clocks
> > >and GSR goes high briefly about 3 seconds in then stays low. Whereto
next
> ?
> > >not graveyard / mule paddock surely
> > >
> >
> > Email Event and ask them if they know of anyone who might have more
> > information?
>
> Well I've sent the following but I somehow doubt anything useful in reply
>
>
> Event Ezbus, fails to boot
> Just the message "Becoming Ezbus..." and nothing else, no response to
> anything. I'm an electronic engineer so if an internal physical reset is
all
> that is required, no problem. I Have tried all easy 2 and 3 button push
> "factory reset" at power-up combinations.
>
>

worse than that
techsupportATevent1.com
just bounces emails with cryptic messages.
I used 2 totally different accounts

mike <(E-Mail Removed)> wrote in message
news:9209ec55-2ae2-4aa4-8446-(E-Mail Removed)...
>
>
> N_Cook wrote:
> > N_Cook <(E-Mail Removed)> wrote in message
> > news:hqhmlg$gas$(E-Mail Removed)...
> > > <Meat Plow> wrote in message news:(E-Mail Removed)...
> > > > On Mon, 19 Apr 2010 10:16:29 +0100, "N_Cook"
<(E-Mail Removed)>wrote:
> > > >
> > > > >2 and 3 button power-ups produced nothing. About 10MHz on the 3
CPLD
> > > clocks
> > > > >and GSR goes high briefly about 3 seconds in then stays low.
Whereto
> > next
> > > ?
> > > > >not graveyard / mule paddock surely
> > > > >
> > > >
> > > > Email Event and ask them if they know of anyone who might have more
> > > > information?
> > >
> > > Well I've sent the following but I somehow doubt anything useful in
reply
> > >
> > >
> Maybe they just changed their address, found this on the web:
>
> http://event1.com/contact.php
>
> they also have a different email on their support page.
>
> Mikel



I'd found a small number of references to techsupport in front of the @ on
that varriant , and will try that